The given figure shows a plant with some of its parts labelled as a, b and c. Select the correct option regarding it.

• A.  In absence of a' plant will die due to lack   of food as it will not be formed,         
• B.         In absence of 'b' plant will die due to lack   of water as it will not be absorbed.       
• C.         In absence of c', plant will die due to unavailability of air as it cannot enter the plant.
• D.         Both (a) and (b)